Columbia Blue (#C4D8E2)

/* Background */
.element {
    background-color: #C4D8E2;
}

/* Text */
.element {
    color: #C4D8E2;
}

/* Border */
.element {
    border: 1px solid #C4D8E2;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #C4D8E2,
        #E6E1DE
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #C4D8E2,
        #E6E1DE
    );
}

// SCSS variable
$columbia-blue: #C4D8E2;

// With RGB channels (useful for rgba() usage)
$columbia-blue-r: 196;
$columbia-blue-g: 216;
$columbia-blue-b: 226;

// Usage
.element {
    background-color: $columbia-blue;
    color: rgba($columbia-blue-r, $columbia-blue-g, $columbia-blue-b, 0.8);
}